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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, traveling at speed v, stops in time t whem1ws r s7j7en5+.h rdmn maximum braking force is applied. Assuming the braking force is independent of mass, what time would be required to stop a car of mass 2m travelm rhw+5njde7 1m7rs.s ing at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velocity of a moving objv.x*.ql1xq c eect is doubled, its_______is also doubled.x*1cqqxe. l.v

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fnetrp66 x 2auyg rpw4be7g8: xf a-b65bie $\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is most closely assoivvd+cs 58cwt,) 3 gtociated with the following observation 8 ,vd)5i sgo+3twcctvabout an isolated object: “The linear momentum of the object is constant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of wv e(k6 mo-p0can object is always in the same direction as them6 keo0w(v- pc

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net force act to pl wvepx-1j +i+m+a ms2roduce a change in momentum of 200 kg.m/sm2 l+xwvsp-j+ +im1 ea?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have th*ufx6). )gi6 + jj/yfpxerfrje same momentum. Q can have more kinetic energy than P if it)rjfj x)rui/.fxfjy6*g 6+e p:

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0m*f7r,y82atr2qp9im sv t 9.e 2potof.50 kg and a speed of 6.0 m/s collides perpendicularly with a wall and bounces off with a speed of 4.0 m/s in the opposite direction.mproteqtiyv2 ptafm9 78r,os .f292 * What is the magnitude of the impulse acting on the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls freely from a height of 4 )mu (g8gn5oiq5 7) aamsu.ds pmeters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampoline. Wh.imq d8og ugs)5u7m a5s)pa (nat is the average force the trampoline applies on the gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass moves at 10.0 m/s wdxo hf* -fze/q vuc ayuveuw5.2 )r;17hen it has a collision in space. The mass’s speed was unchanged, but the .;15yv v o2wxu7)efq af/-dur*zecuhdirection of its velocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking a 0.125 kg-baseball is in contact wit v)ywm)trj+ f)sa,,rt h the ball for a time of 0.03 seconds. The ball travels in a straight line as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average ff,+,j vrt)awm)rst y) orce acting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal d ef0 byq7/t8juma49ikinetic energy of 100.0 J and an x-component of b0fa q ujy9m4itd/e 87linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. What is they-component of the object’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time b2t9g.lo t)tet, a point object of mass M moves with velocity V, has acceleration a, and is at position (x,y). In what direction must the lineal9 bt).o2gte tr momentum of the object be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mass 2.0 kg falling drix7isf nmy1c9+sn*knya:g -54buv 2zp -6tstraight downward hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 Ndr+z9ys*tx:2pi5ys1m4 a-cinb fuk- v67 nng/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg fallwdn bad 41q8qc qq2 db+je)/ire//hk4ing straight downward hits the ground with a speed of 0.90 2d ba) nw1bi/deqc4+k//8e rq d qh4jqm/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is being pushed to the right acru1+nuc ,(wrg 0icnrb 8oss a horizontal surface while a constant fricti rnwc+8brc n0,u(g1 uional force of 8.0 N acts on the box. At some instant of time, the box has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being pushed to the right avp9 a7oh jlua 049ife5cross a horizontal surface. h v9ap074ojul e9 5faiWhen the box has 12.0 J of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices best represents the magnitude of the linear momentum of the box at this instant?

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